A 55-year-old woman was diagnosed with anti-melanoma differentiation-associated gene 5 (anti-MDA5) positive dermatomyositis (DM) in 2020, having low grade fever, weight loss, arthritis in small joint of hands, erythematous-desquamative lesions on hands, cuticle dystrophy and severe skin ulcerations. The gene discussed is IFIH1; the disease is arthritic joint disease.